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Kelty Cosmic Synthetic 20

rated 4 of 5 stars
photo: Kelty Cosmic Synthetic 20 3-season synthetic sleeping bag

I love this bag.


  • Warm
  • Comfortable

Back story: As a scout in the '70s, late '70s, we camped year round and down versus synthetic was always a hot topic. At some point my parents got me a synthetic mummy bag that wasn't as warm in February as some of the huge down bags. In 1979 I went to Philmont and in ten days it rained six, wettest year on record. Wet night after wet night I was ever so glad to have a bag that was warm when wet.

When my kids were young they each got Disney sleeping bags that were fun to snuggle in or use on sleepovers.  One night we were at Eastern Mountain Sports and they were closing out this bag, or this color. I couldn't resist the price and it looked and had the same synthetic material as my Philmont bag so I got one for each of the kids.

As it turned the kids never used them together. Either my wife or I went camping and used the other bag. Two Novembers a group of dads in town would book the whole Zealand hut in the White Mountains and I remember them talking about all of the strategies for staying warm. At first I though I just had warm years but I figured out that this bag was really comfortable and warm, especially at high twenty, low thirty temperatures in the hut.

My only reservation is that the bag is big when in the stuff sack. 

Source: bought it new
Price Paid: $45

With the Cosmic, Kelty delivers a terrific three-season bag. It has a great feminine look and a terrific sub-$100 price tag.


  • Great styling
  • Warm
  • Sub-$100


  • Heavy

Kelty positions the women’s Cosmic 20 as a bag that spans “cool spring nights into a brisk fall” and does it all for a bargain price (sub $100).

We were struck by its decidedly feminine look — thanks to the light blue and brown polka dot color scheme and embroidered flower accents. But this bag’s beauty was more than skin deep. We chose the Girl Scout Camporee over Memorial Day weekend for our test. In the coastal mountains it felt more like a winter in Siberia than Summer in Santa Cruz, but with this sleeping bag we were cozy and warm through the frigid night.

For the full review and photos, visit GearGuide.

Source: tested or reviewed it for the manufacturer (Kelty)

The author of this review received a sample of the product from the brand or its representative in exchange for a review.

Great bag for the price ... took it out for an overnight late winter and slept nice and cozy at 28*F in my tent with my DIY footprint bubble foil insulation.

Price Paid: Under U$60

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regular long
Price MSRP: $104.95
Current Retail: $99.95-$114.95
Historic Range: $52.95-$159.95
Reviewers Paid: $45.00
ISO Temp Rating (Comfort) 32°F / 0°C
ISO Temp Rating (Limit) 22°F / -6°C
Fits to 6’ / 183 cm 6’ 6" / 198 cm
Length 78 in / 198 cm 84 in / 213 cm
Shoulder Width 31 in / 78.5 cm 32 in / 81 cm
Fill Weight 30.5 oz / .86 kg 33 oz / .95 kg
Total Weight 2 lb 13 oz / 1.3 kg 3 lb 4 oz / 1.4 kg
Stuffed Size 16 x 9.5 in / 41 x 24 cm 16 x 9.5 in / 41 x 24 cm
Price MSRP: $109.95
Current Retail: $109.95
Historic Range: $49.95-$109.95
ISO Temp Rating (Comfort) 25°F / -4°C
ISO Temp Rating (Limit) 13°F / -11°C
Insulation CirroLoft synthetic insulation
Fits to 5' 8"/ 172 cm
Length 74 in / 188 cm
Shoulder Width 30 in / 76.2 cm
Fill Weight 46 oz / 1.3 kg
Total Weight 3 lb 12 oz / 1.7 kg
Stuffed Size 16 x 10 in / 41 x 25 cm
Product Details from Kelty »

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